919.175260 bogs and shuts down at 40 psi
919.175260 motor information plate
Hello everyone! I have a Craftsman 919.175260 that I had inherited from my father who is a retired mechanic. The compressor was in his home garage and had minimal use. I brought it to my place and connected it up.
The compressor started to build air and quit when it hit 40 psi. The motor was bogging and the belt started to squeal causing the internal motor breaker to trip.
I immediately searched the internet and found this website and followed all off the trouble shooting recommendations.
I thought the caps were bad and replaced them with no change.
I then thought that the motor was failing and took it the repair shop. The technician checked the internal parts and done a load test finding nothing wrong. He said that the motor was like new.
Next, I replaced the check valve with no success.
I then opened the head and found the reed valves had a little carbon build up in. I cleaned the reed valves well and reassembled the compressor.
The pistons and cylinder walls looked good with no scratches. I fired the motor up again and the compressor pumped up to 50 psi, and it started to bog, tripping the internal motor breaker again.
Any suggestions? I ordered new reed valves today thinking that they may be worn out and possibly causing back pressure to enter into the cylinder. One thing that I did see is a slight hair crack under the valve reed near the screw on the head. Could this be the issue? I surfed the net for a new head and it is discontinued.